new file mode 100644
@@ -0,0 +1,1806 @@
+/*
+ * Copyright (c) 2006 Damien Bergamini <damien.bergamini@free.fr>
+ * Copyright (c) 2006 Sam Leffler, Errno Consulting
+ * Copyright (c) 2007 Christoph Hellwig <hch@lst.de>
+ * Copyright (c) 2008-2009 Weongyo Jeong <weongyo@freebsd.org>
+ * Copyright (c) 2012 Pontus Fuchs <pontus.fuchs@gmail.com>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * This driver is based on the uath driver written by Damien Bergamini for
+ * OpenBSD, who did black-box analysis of the Windows binary driver to find
+ * out how the hardware works. It contains a lot magic numbers because of
+ * that and only has minimal functionality.
+ */
+#include <linux/compiler.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/list.h>
+#include <linux/completion.h>
+#include <linux/firmware.h>
+#include <linux/skbuff.h>
+#include <linux/usb.h>
+#include <net/mac80211.h>
+
+#include "ar5523.h"
+#include "ar5523_hw.h"
+
+/*
+ * Various supported device vendors/products.
+ * UB51: AR5005UG 802.11b/g, UB52: AR5005UX 802.11a/b/g
+ */
+
+static int ar5523_submit_rx_cmd(struct ar5523 *ar);
+static void ar5523_data_tx_pkt_put(struct ar5523 *ar);
+
+static void ar5523_read_reply(struct ar5523 *ar, struct ar5523_cmd_hdr *hdr,
+ struct ar5523_tx_cmd *cmd)
+{
+ int dlen, olen;
+ u32 *rp;
+
+ dlen = hdr->len - sizeof(*hdr);
+
+ if (dlen < 0) {
+ WARN_ON(1);
+ goto out;
+ }
+
+ ar5523_dbg(ar, "Code = %d len = %d\n", hdr->code & 0xff, dlen);
+
+ rp = (u32 *)(hdr + 1);
+ if (dlen >= sizeof(u32)) {
+ olen = be32_to_cpu(rp[0]);
+ dlen -= sizeof(u32);
+ if (olen == 0) {
+ /* convention is 0 =>'s one word */
+ olen = sizeof(u32);
+ }
+ } else
+ olen = 0;
+
+ if (cmd->odata) {
+ if (cmd->olen < olen) {
+ ar5523_err(ar, "olen to small %d < %d\n",
+ cmd->olen, olen);
+ cmd->olen = 0;
+ cmd->res = -EOVERFLOW;
+ } else {
+ cmd->olen = olen;
+ memcpy(cmd->odata, &rp[1], olen);
+ cmd->res = 0;
+ }
+ }
+
+out:
+ complete(&cmd->done);
+}
+
+static void ar5523_cmd_rx_cb(struct urb *urb)
+{
+ struct ar5523 *ar = urb->context;
+ struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
+ struct ar5523_cmd_hdr *hdr = ar->rx_cmd_buf;
+ int dlen;
+
+ if (urb->status) {
+ if (urb->status != -ESHUTDOWN)
+ ar5523_err(ar, "RX USB error %d.\n", urb->status);
+ goto skip;
+ }
+
+ if (urb->actual_length < sizeof(struct ar5523_cmd_hdr)) {
+ ar5523_err(ar, "RX USB to short.\n");
+ goto skip;
+ }
+
+ ar5523_dbg(ar, "%s code %02x priv %d\n", __func__,
+ be32_to_cpu(hdr->code) & 0xff, hdr->priv);
+
+ hdr->code = be32_to_cpu(hdr->code);
+ hdr->len = be32_to_cpu(hdr->len);
+
+ switch (hdr->code & 0xff) {
+ default:
+ /* reply to a read command */
+ if (hdr->priv != AR5523_CMD_ID) {
+ ar5523_err(ar, "Unexpected command id: %02x\n",
+ hdr->code & 0xff);
+ goto skip;
+ }
+ ar5523_read_reply(ar, hdr, cmd);
+ break;
+
+ case WDCMSG_DEVICE_AVAIL:
+ ar5523_dbg(ar, "WDCMSG_DEVICE_AVAIL\n");
+ cmd->res = 0;
+ cmd->olen = 0;
+ complete(&cmd->done);
+ break;
+
+ case WDCMSG_SEND_COMPLETE:
+ ar5523_dbg(ar, "WDCMSG_SEND_COMPLETE: %d pending\n",
+ atomic_read(&ar->tx_nr_pending));
+ if (!test_bit(AR5523_HW_UP, &ar->flags))
+ ar5523_dbg(ar, "Unexpected WDCMSG_SEND_COMPLETE\n");
+ else {
+ mod_timer(&ar->tx_wd_timer,
+ jiffies + AR5523_TX_WD_TIMEOUT);
+ ar5523_data_tx_pkt_put(ar);
+
+ }
+ break;
+
+ case WDCMSG_TARGET_START:
+ /* This command returns a bogus id so it needs special
+ handling */
+ dlen = hdr->len - sizeof(*hdr);
+ if (dlen != (int)sizeof(u32)) {
+ ar5523_err(ar, "Invalid reply to WDCMSG_TARGET_START");
+ return;
+ }
+ memcpy(cmd->odata, hdr + 1, sizeof(u32));
+ cmd->olen = sizeof(u32);
+ cmd->res = 0;
+ complete(&cmd->done);
+ break;
+
+ case WDCMSG_STATS_UPDATE:
+ ar5523_dbg(ar, "WDCMSG_STATS_UPDATE\n");
+ break;
+ }
+
+skip:
+ ar5523_submit_rx_cmd(ar);
+}
+
+static int ar5523_alloc_rx_cmd(struct ar5523 *ar)
+{
+ ar->rx_cmd_urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!ar->rx_cmd_urb)
+ return -ENOMEM;
+
+ ar->rx_cmd_buf = usb_alloc_coherent(ar->dev, AR5523_MAX_RXCMDSZ,
+ GFP_KERNEL,
+ &ar->rx_cmd_urb->transfer_dma);
+ if (!ar->rx_cmd_buf) {
+ usb_free_urb(ar->rx_cmd_urb);
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+static void ar5523_cancel_rx_cmd(struct ar5523 *ar)
+{
+ usb_kill_urb(ar->rx_cmd_urb);
+}
+
+static void ar5523_free_rx_cmd(struct ar5523 *ar)
+{
+ usb_free_coherent(ar->dev, AR5523_MAX_RXCMDSZ,
+ ar->rx_cmd_buf, ar->rx_cmd_urb->transfer_dma);
+ usb_free_urb(ar->rx_cmd_urb);
+}
+
+static int ar5523_submit_rx_cmd(struct ar5523 *ar)
+{
+ int error;
+
+ usb_fill_bulk_urb(ar->rx_cmd_urb, ar->dev,
+ ar5523_cmd_rx_pipe(ar->dev), ar->rx_cmd_buf,
+ AR5523_MAX_RXCMDSZ, ar5523_cmd_rx_cb, ar);
+ ar->rx_cmd_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+ error = usb_submit_urb(ar->rx_cmd_urb, GFP_ATOMIC);
+ if (error) {
+ if (error != -ENODEV)
+ ar5523_err(ar, "error %d when submitting rx urb\n",
+ error);
+ return error;
+ }
+ return 0;
+}
+
+/*
+ * Command submitted cb
+ */
+static void ar5523_cmd_tx_cb(struct urb *urb)
+{
+ struct ar5523_tx_cmd *cmd = urb->context;
+ struct ar5523 *ar = cmd->ar;
+
+ if (urb->status) {
+ ar5523_err(ar, "Failed to TX command. Status = %d\n",
+ urb->status);
+ cmd->res = urb->status;
+ complete(&cmd->done);
+ return;
+ }
+
+ if (!(cmd->flags & AR5523_CMD_FLAG_READ)) {
+ cmd->res = 0;
+ complete(&cmd->done);
+ }
+}
+
+static int ar5523_cmd(struct ar5523 *ar, u32 code, const void *idata,
+ int ilen, void *odata, int olen, int flags)
+{
+ struct ar5523_cmd_hdr *hdr;
+ struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
+ int xferlen, error;
+
+ /* always bulk-out a multiple of 4 bytes */
+ xferlen = (sizeof(struct ar5523_cmd_hdr) + ilen + 3) & ~3;
+
+ hdr = (struct ar5523_cmd_hdr *)cmd->buf_tx;
+ memset(hdr, 0, sizeof(struct ar5523_cmd_hdr));
+ hdr->len = cpu_to_be32(xferlen);
+ hdr->code = cpu_to_be32(code);
+ hdr->priv = AR5523_CMD_ID;
+
+ if (flags & AR5523_CMD_FLAG_MAGIC)
+ hdr->magic = cpu_to_be32(1 << 24);
+ memcpy(hdr + 1, idata, ilen);
+
+ cmd->odata = odata;
+ cmd->olen = olen;
+ cmd->flags = flags;
+
+ ar5523_dbg(ar, "do cmd %02x\n", code);
+
+ usb_fill_bulk_urb(cmd->urb_tx, ar->dev, ar5523_cmd_tx_pipe(ar->dev),
+ cmd->buf_tx, xferlen, ar5523_cmd_tx_cb, cmd);
+ cmd->urb_tx->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+ error = usb_submit_urb(cmd->urb_tx, GFP_KERNEL);
+ if (error) {
+ ar5523_err(ar, "could not send command 0x%x, error=%d\n",
+ code, error);
+ return error;
+ }
+
+ if (!wait_for_completion_timeout(&cmd->done, 2 * HZ)) {
+ cmd->odata = NULL;
+ ar5523_err(ar, "timeout waiting for command %02x reply\n",
+ code);
+ cmd->res = -ETIMEDOUT;
+ }
+ return cmd->res;
+}
+
+static int ar5523_cmd_write(struct ar5523 *ar, u32 code, const void *data,
+ int len, int flags)
+{
+ flags &= ~AR5523_CMD_FLAG_READ;
+ return ar5523_cmd(ar, code, data, len, NULL, 0, flags);
+}
+
+static int ar5523_cmd_read(struct ar5523 *ar, u32 code, const void *idata,
+ int ilen, void *odata, int olen, int flags)
+{
+ flags |= AR5523_CMD_FLAG_READ;
+ return ar5523_cmd(ar, code, idata, ilen, odata, olen, flags);
+}
+
+static int ar5523_config(struct ar5523 *ar, u32 reg, u32 val)
+{
+ struct ar5523_write_mac write;
+ int error;
+
+ write.reg = cpu_to_be32(reg);
+ write.len = cpu_to_be32(0); /* 0 = single write */
+ *(u32 *)write.data = cpu_to_be32(val);
+
+ error = ar5523_cmd_write(ar, WDCMSG_TARGET_SET_CONFIG, &write,
+ 3 * sizeof(u32), 0);
+ if (error != 0)
+ ar5523_err(ar, "could not write register 0x%02x\n", reg);
+ return error;
+}
+
+static int ar5523_config_multi(struct ar5523 *ar, u32 reg, const void *data,
+ int len)
+{
+ struct ar5523_write_mac write;
+ int error;
+
+ write.reg = cpu_to_be32(reg);
+ write.len = cpu_to_be32(len);
+ memcpy(write.data, data, len);
+
+ /* properly handle the case where len is zero (reset) */
+ error = ar5523_cmd_write(ar, WDCMSG_TARGET_SET_CONFIG, &write,
+ (len == 0) ? sizeof(u32) : 2 * sizeof(u32) + len, 0);
+ if (error != 0)
+ ar5523_err(ar, "could not write %d bytes to register 0x%02x\n",
+ len, reg);
+ return error;
+}
+
+static int ar5523_get_status(struct ar5523 *ar, u32 which, void *odata,
+ int olen)
+{
+ int error;
+
+ which = cpu_to_be32(which);
+ error = ar5523_cmd_read(ar, WDCMSG_TARGET_GET_STATUS,
+ &which, sizeof(which), odata, olen, AR5523_CMD_FLAG_MAGIC);
+ if (error != 0)
+ ar5523_err(ar, "could not read EEPROM offset 0x%02x\n",
+ be32_to_cpu(which));
+ return error;
+}
+
+static int ar5523_get_capability(struct ar5523 *ar, u32 cap, u32 *val)
+{
+ int error;
+
+ cap = cpu_to_be32(cap);
+ error = ar5523_cmd_read(ar, WDCMSG_TARGET_GET_CAPABILITY,
+ &cap, sizeof(cap), val, sizeof(u32), AR5523_CMD_FLAG_MAGIC);
+ if (error != 0) {
+ ar5523_err(ar, "could not read capability %u\n",
+ be32_to_cpu(cap));
+ return error;
+ }
+ *val = be32_to_cpu(*val);
+ return error;
+}
+
+static int ar5523_get_devcap(struct ar5523 *ar)
+{
+#define GETCAP(x) do { \
+ error = ar5523_get_capability(ar, x, &cap); \
+ if (error != 0) \
+ return error; \
+ ar5523_info(ar, "Cap: " \
+ "%s=0x%08x\n", #x, cap); \
+} while (0)
+ int error;
+ u32 cap;
+
+ /* collect device capabilities */
+ GETCAP(CAP_TARGET_VERSION);
+ GETCAP(CAP_TARGET_REVISION);
+ GETCAP(CAP_MAC_VERSION);
+ GETCAP(CAP_MAC_REVISION);
+ GETCAP(CAP_PHY_REVISION);
+ GETCAP(CAP_ANALOG_5GHz_REVISION);
+ GETCAP(CAP_ANALOG_2GHz_REVISION);
+
+ GETCAP(CAP_REG_DOMAIN);
+ GETCAP(CAP_REG_CAP_BITS);
+ GETCAP(CAP_WIRELESS_MODES);
+ GETCAP(CAP_CHAN_SPREAD_SUPPORT);
+ GETCAP(CAP_COMPRESS_SUPPORT);
+ GETCAP(CAP_BURST_SUPPORT);
+ GETCAP(CAP_FAST_FRAMES_SUPPORT);
+ GETCAP(CAP_CHAP_TUNING_SUPPORT);
+ GETCAP(CAP_TURBOG_SUPPORT);
+ GETCAP(CAP_TURBO_PRIME_SUPPORT);
+ GETCAP(CAP_DEVICE_TYPE);
+ GETCAP(CAP_WME_SUPPORT);
+ GETCAP(CAP_TOTAL_QUEUES);
+ GETCAP(CAP_CONNECTION_ID_MAX);
+
+ GETCAP(CAP_LOW_5GHZ_CHAN);
+ GETCAP(CAP_HIGH_5GHZ_CHAN);
+ GETCAP(CAP_LOW_2GHZ_CHAN);
+ GETCAP(CAP_HIGH_2GHZ_CHAN);
+ GETCAP(CAP_TWICE_ANTENNAGAIN_5G);
+ GETCAP(CAP_TWICE_ANTENNAGAIN_2G);
+
+ GETCAP(CAP_CIPHER_AES_CCM);
+ GETCAP(CAP_CIPHER_TKIP);
+ GETCAP(CAP_MIC_TKIP);
+ return 0;
+}
+
+static int ar5523_set_ledsteady(struct ar5523 *ar, int lednum, int ledmode)
+{
+ struct ar5523_cmd_ledsteady led;
+
+ led.lednum = cpu_to_be32(lednum);
+ led.ledmode = cpu_to_be32(ledmode);
+
+ ar5523_dbg(ar, "set %s led %s (steady)\n",
+ (lednum == UATH_LED_LINK) ? "link" : "activity",
+ ledmode ? "on" : "off");
+ return ar5523_cmd_write(ar, WDCMSG_SET_LED_STEADY, &led, sizeof(led),
+ 0);
+}
+
+static int ar5523_set_rxfilter(struct ar5523 *ar, u32 bits, u32 op)
+{
+ struct ar5523_cmd_rx_filter rxfilter;
+
+ rxfilter.bits = cpu_to_be32(bits);
+ rxfilter.op = cpu_to_be32(op);
+
+ ar5523_dbg(ar, "setting Rx filter=0x%x flags=0x%x\n", bits, op);
+ return ar5523_cmd_write(ar, WDCMSG_RX_FILTER, &rxfilter,
+ sizeof(rxfilter), 0);
+}
+
+static int ar5523_reset_tx_queues(struct ar5523 *ar)
+{
+ __be32 qid = cpu_to_be32(0);
+
+ ar5523_dbg(ar, "resetting Tx queue\n");
+ return ar5523_cmd_write(ar, WDCMSG_RELEASE_TX_QUEUE,
+ &qid, sizeof(qid), 0);
+}
+
+static int ar5523_set_chan(struct ar5523 *ar)
+{
+ struct ieee80211_conf *conf = &ar->hw->conf;
+
+ struct ar5523_cmd_reset reset;
+
+ memset(&reset, 0, sizeof(reset));
+ reset.flags |= cpu_to_be32(UATH_CHAN_2GHZ);
+ reset.flags |= cpu_to_be32(UATH_CHAN_OFDM);
+ reset.freq = cpu_to_be32(conf->channel->center_freq);
+ reset.maxrdpower = cpu_to_be32(50); /* XXX */
+ reset.channelchange = cpu_to_be32(1);
+ reset.keeprccontent = cpu_to_be32(0);
+
+ ar5523_dbg(ar, "set chan flags 0x%x freq %d\n",
+ be32_to_cpu(reset.flags),
+ conf->channel->center_freq);
+ return ar5523_cmd_write(ar, WDCMSG_RESET, &reset, sizeof(reset), 0);
+}
+
+static int ar5523_queue_init(struct ar5523 *ar)
+{
+ struct ar5523_cmd_txq_setup qinfo;
+
+ ar5523_dbg(ar, "setting up Tx queue\n");
+ qinfo.qid = cpu_to_be32(0);
+ qinfo.len = cpu_to_be32(sizeof(qinfo.attr));
+ qinfo.attr.priority = cpu_to_be32(0); /* XXX */
+ qinfo.attr.aifs = cpu_to_be32(3);
+ qinfo.attr.logcwmin = cpu_to_be32(4);
+ qinfo.attr.logcwmax = cpu_to_be32(10);
+ qinfo.attr.bursttime = cpu_to_be32(0);
+ qinfo.attr.mode = cpu_to_be32(0);
+ qinfo.attr.qflags = cpu_to_be32(1); /* XXX? */
+ return ar5523_cmd_write(ar, WDCMSG_SETUP_TX_QUEUE, &qinfo,
+ sizeof(qinfo), 0);
+}
+
+static int ar5523_switch_chan(struct ar5523 *ar)
+{
+ int error;
+
+ error = ar5523_set_chan(ar);
+ if (error) {
+ ar5523_err(ar, "could not set chan, error %d\n", error);
+ goto out_err;
+ }
+
+ /* reset Tx rings */
+ error = ar5523_reset_tx_queues(ar);
+ if (error) {
+ ar5523_err(ar, "could not reset Tx queues, error %d\n",
+ error);
+ goto out_err;
+ }
+ /* set Tx rings WME properties */
+ error = ar5523_queue_init(ar);
+ if (error)
+ ar5523_err(ar, "could not init wme, error %d\n", error);
+
+out_err:
+ return error;
+}
+
+static void ar5523_rx_data_put(struct ar5523 *ar,
+ struct ar5523_rx_data *data)
+{
+ unsigned long flags;
+ spin_lock_irqsave(&ar->rx_data_list_lock, flags);
+ list_move(&data->list, &ar->rx_data_free);
+ spin_unlock_irqrestore(&ar->rx_data_list_lock, flags);
+}
+
+static void ar5523_data_rx_cb(struct urb *urb)
+{
+ struct ar5523_rx_data *data = urb->context;
+ struct ar5523 *ar = data->ar;
+ struct ar5523_rx_desc *desc;
+ struct ar5523_chunk *chunk;
+ struct ieee80211_hw *hw = ar->hw;
+ struct ieee80211_rx_status *rx_status;
+ u32 rxlen;
+ int usblen = urb->actual_length;
+ int hdrlen, pad;
+
+ ar5523_dbg(ar, "%s\n", __func__);
+ /* sync/async unlink faults aren't errors */
+ if (urb->status) {
+ if (urb->status != -ESHUTDOWN)
+ ar5523_err(ar, "%s: USB err: %d\n", __func__,
+ urb->status);
+ goto skip;
+ }
+
+ if (usblen < AR5523_MIN_RXBUFSZ) {
+ ar5523_err(ar, "RX: wrong xfer size (usblen=%d)\n", usblen);
+ goto skip;
+ }
+
+ chunk = (struct ar5523_chunk *) data->skb->data;
+
+ if (((chunk->flags & UATH_CFLAGS_FINAL) == 0) ||
+ chunk->seqnum != 0) {
+ ar5523_dbg(ar, "RX: No final flag. s: %d f: %02x l: %d\n",
+ chunk->seqnum, chunk->flags,
+ be16_to_cpu(chunk->length));
+ goto skip;
+ }
+
+ /* Rx descriptor is located at the end, 32-bit aligned */
+ desc = (struct ar5523_rx_desc *)
+ (data->skb->data + usblen - sizeof(struct ar5523_rx_desc));
+
+ rxlen = be32_to_cpu(desc->len);
+ if (rxlen > ar->rxbufsz) {
+ ar5523_dbg(ar, "RX: Bad descriptor (len=%d)\n",
+ be32_to_cpu(desc->len));
+ goto skip;
+ }
+
+ if (!rxlen) {
+ ar5523_dbg(ar, "RX: rxlen is 0\n");
+ goto skip;
+ }
+
+ if (be32_to_cpu(desc->status) != 0) {
+ ar5523_dbg(ar, "Bad RX status (0x%x len = %d). Skip\n",
+ be32_to_cpu(desc->status), be32_to_cpu(desc->len));
+ goto skip;
+ }
+
+ skb_reserve(data->skb, sizeof(*chunk));
+ skb_put(data->skb, rxlen - sizeof(struct ar5523_rx_desc));
+
+ hdrlen = ieee80211_get_hdrlen_from_skb(data->skb);
+ if (!IS_ALIGNED(hdrlen, 4)) {
+ ar5523_dbg(ar, "eek, alignment workaround activated\n");
+ pad = ALIGN(hdrlen, 4) - hdrlen;
+ memmove(data->skb->data + pad, data->skb->data, hdrlen);
+ skb_pull(data->skb, pad);
+ skb_put(data->skb, pad);
+ }
+
+ rx_status = IEEE80211_SKB_RXCB(data->skb);
+ memset(rx_status, 0, sizeof(*rx_status));
+ rx_status->freq = be32_to_cpu(desc->channel);
+ rx_status->band = hw->conf.channel->band;
+ rx_status->signal = -95 + be32_to_cpu(desc->rssi);
+
+ ieee80211_rx_irqsafe(hw, data->skb);
+ data->skb = NULL;
+
+skip:
+ if (data->skb) {
+ dev_kfree_skb_irq(data->skb);
+ data->skb = NULL;
+ }
+
+ ar5523_rx_data_put(ar, data);
+ if (atomic_inc_return(&ar->rx_data_free_cnt) >=
+ AR5523_RX_DATA_REFILL_COUNT &&
+ test_bit(AR5523_HW_UP, &ar->flags))
+ queue_work(ar->wq, &ar->rx_refill_work);
+}
+
+static void ar5523_rx_refill_work(struct work_struct *work)
+{
+ struct ar5523 *ar = container_of(work, struct ar5523, rx_refill_work);
+ struct ar5523_rx_data *data;
+ unsigned long flags;
+ int error;
+
+ ar5523_dbg(ar, "%s\n", __func__);
+ do {
+ spin_lock_irqsave(&ar->rx_data_list_lock, flags);
+
+ if (!list_empty(&ar->rx_data_free))
+ data = (struct ar5523_rx_data *) ar->rx_data_free.next;
+ else
+ data = NULL;
+ spin_unlock_irqrestore(&ar->rx_data_list_lock, flags);
+
+ if (!data)
+ goto done;
+
+ data->skb = alloc_skb(ar->rxbufsz, GFP_KERNEL);
+ if (!data->skb) {
+ ar5523_err(ar, "could not allocate rx skbuff\n");
+ return;
+ }
+
+ usb_fill_bulk_urb(data->urb, ar->dev,
+ ar5523_data_rx_pipe(ar->dev), data->skb->data,
+ ar->rxbufsz, ar5523_data_rx_cb, data);
+
+ spin_lock_irqsave(&ar->rx_data_list_lock, flags);
+ list_move(&data->list, &ar->rx_data_used);
+ spin_unlock_irqrestore(&ar->rx_data_list_lock, flags);
+ atomic_dec(&ar->rx_data_free_cnt);
+
+ error = usb_submit_urb(data->urb, GFP_KERNEL);
+ if (error) {
+ kfree_skb(data->skb);
+ if (error != -ENODEV)
+ ar5523_err(ar, "Err sending rx data urb %d\n",
+ error);
+ ar5523_rx_data_put(ar, data);
+ atomic_inc(&ar->rx_data_free_cnt);
+ return;
+ }
+
+ } while (true);
+done:
+ return;
+}
+
+static void ar5523_cancel_rx_bufs(struct ar5523 *ar)
+{
+ struct ar5523_rx_data *data;
+ unsigned long flags;
+
+ do {
+ spin_lock_irqsave(&ar->rx_data_list_lock, flags);
+ if (!list_empty(&ar->rx_data_used))
+ data = (struct ar5523_rx_data *) ar->rx_data_used.next;
+ else
+ data = NULL;
+ spin_unlock_irqrestore(&ar->rx_data_list_lock, flags);
+
+ if (!data)
+ break;
+
+ usb_kill_urb(data->urb);
+ list_move(&data->list, &ar->rx_data_free);
+ atomic_inc(&ar->rx_data_free_cnt);
+ } while (data);
+}
+
+static void ar5523_free_rx_bufs(struct ar5523 *ar)
+{
+ struct ar5523_rx_data *data;
+
+ ar5523_cancel_rx_bufs(ar);
+ while (!list_empty(&ar->rx_data_free)) {
+ data = (struct ar5523_rx_data *) ar->rx_data_free.next;
+ list_del(&data->list);
+ usb_free_urb(data->urb);
+ }
+}
+
+static int ar5523_alloc_rx_bufs(struct ar5523 *ar)
+{
+ int i;
+
+ for (i = 0; i < AR5523_RX_DATA_COUNT; i++) {
+ struct ar5523_rx_data *data = &ar->rx_data[i];
+
+ data->ar = ar;
+ data->urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!data->urb) {
+ ar5523_err(ar, "could not allocate rx data urb\n");
+ goto err;
+ }
+ list_add_tail(&data->list, &ar->rx_data_free);
+ atomic_inc(&ar->rx_data_free_cnt);
+ }
+ return 0;
+
+err:
+ ar5523_free_rx_bufs(ar);
+ return -ENOMEM;
+}
+
+static void ar5523_data_tx_pkt_put(struct ar5523 *ar)
+{
+ atomic_dec(&ar->tx_nr_total);
+ if (!atomic_dec_return(&ar->tx_nr_pending)) {
+ del_timer(&ar->tx_wd_timer);
+ wake_up(&ar->tx_flush_waitq);
+ }
+
+ if (atomic_read(&ar->tx_nr_total) < AR5523_TX_DATA_RESTART_COUNT) {
+ ar5523_dbg(ar, "restart tx queue\n");
+ ieee80211_wake_queues(ar->hw);
+ }
+}
+
+static void ar5523_data_tx_cb(struct urb *urb)
+{
+ struct sk_buff *skb = urb->context;
+ struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
+ struct ar5523_tx_data *data = (struct ar5523_tx_data *)
+ txi->driver_data;
+ struct ar5523 *ar = data->ar;
+ unsigned long flags;
+
+ ar5523_dbg(ar, "data tx urb completed: %d\n", urb->status);
+
+ spin_lock_irqsave(&ar->tx_data_list_lock, flags);
+ list_del(&data->list);
+ spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
+
+ if (urb->status) {
+ ar5523_dbg(ar, "%s: urb status: %d\n", __func__, urb->status);
+ ar5523_data_tx_pkt_put(ar);
+ ieee80211_free_txskb(ar->hw, skb);
+ } else {
+ skb_pull(skb, sizeof(struct ar5523_tx_desc) + sizeof(__be32));
+ ieee80211_tx_status_irqsafe(ar->hw, skb);
+ }
+ usb_free_urb(urb);
+}
+
+static void ar5523_tx(struct ieee80211_hw *hw,
+ struct ieee80211_tx_control *control,
+ struct sk_buff *skb)
+{
+ struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
+ struct ar5523_tx_data *data = (struct ar5523_tx_data *)
+ txi->driver_data;
+ struct ar5523 *ar = hw->priv;
+ unsigned long flags;
+
+ ar5523_dbg(ar, "tx called\n");
+ if (atomic_inc_return(&ar->tx_nr_total) >= AR5523_TX_DATA_COUNT) {
+ ar5523_dbg(ar, "tx queue full\n");
+ ar5523_dbg(ar, "stop queues (tot %d pend %d)\n",
+ atomic_read(&ar->tx_nr_total),
+ atomic_read(&ar->tx_nr_pending));
+ ieee80211_stop_queues(hw);
+ }
+
+ data->skb = skb;
+
+ spin_lock_irqsave(&ar->tx_data_list_lock, flags);
+ list_add_tail(&data->list, &ar->tx_queue_pending);
+ spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
+
+ ieee80211_queue_work(ar->hw, &ar->tx_work);
+}
+
+static void ar5523_tx_work_locked(struct ar5523 *ar)
+{
+ struct ar5523_tx_data *data;
+ struct ar5523_tx_desc *desc;
+ struct ar5523_chunk *chunk;
+ struct ieee80211_tx_info *txi;
+ struct urb *urb;
+ struct sk_buff *skb;
+ int error = 0, paylen;
+ u32 txqid;
+ unsigned long flags;
+
+ BUILD_BUG_ON(sizeof(struct ar5523_tx_data) >
+ IEEE80211_TX_INFO_DRIVER_DATA_SIZE);
+
+ ar5523_dbg(ar, "%s\n", __func__);
+ do {
+ spin_lock_irqsave(&ar->tx_data_list_lock, flags);
+ if (!list_empty(&ar->tx_queue_pending)) {
+ data = (struct ar5523_tx_data *)
+ ar->tx_queue_pending.next;
+ list_del(&data->list);
+ } else
+ data = NULL;
+ spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
+
+ if (!data)
+ break;
+
+ skb = data->skb;
+ txqid = 0;
+ txi = IEEE80211_SKB_CB(skb);
+ paylen = skb->len;
+ urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!urb) {
+ ar5523_err(ar, "Failed to allocate TX urb\n");
+ ieee80211_free_txskb(ar->hw, skb);
+ continue;
+ }
+
+ data->ar = ar;
+ data->urb = urb;
+
+ desc = (struct ar5523_tx_desc *)skb_push(skb, sizeof(*desc));
+ chunk = (struct ar5523_chunk *)skb_push(skb, sizeof(*chunk));
+
+ chunk->seqnum = 0;
+ chunk->flags = UATH_CFLAGS_FINAL;
+ chunk->length = cpu_to_be16(skb->len);
+
+ desc->msglen = cpu_to_be32(skb->len);
+ desc->msgid = AR5523_DATA_ID;
+ desc->buflen = cpu_to_be32(paylen);
+ desc->type = cpu_to_be32(WDCMSG_SEND);
+ desc->flags = cpu_to_be32(UATH_TX_NOTIFY);
+
+ if (test_bit(AR5523_CONNECTED, &ar->flags))
+ desc->connid = cpu_to_be32(AR5523_ID_BSS);
+ else
+ desc->connid = cpu_to_be32(AR5523_ID_BROADCAST);
+
+ if (txi->flags & IEEE80211_TX_CTL_USE_MINRATE)
+ txqid |= UATH_TXQID_MINRATE;
+
+ desc->txqid = cpu_to_be32(txqid);
+
+ urb->transfer_flags = URB_ZERO_PACKET;
+ usb_fill_bulk_urb(urb, ar->dev, ar5523_data_tx_pipe(ar->dev),
+ skb->data, skb->len, ar5523_data_tx_cb, skb);
+
+ spin_lock_irqsave(&ar->tx_data_list_lock, flags);
+ list_add_tail(&data->list, &ar->tx_queue_submitted);
+ spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
+ mod_timer(&ar->tx_wd_timer, jiffies + AR5523_TX_WD_TIMEOUT);
+ atomic_inc(&ar->tx_nr_pending);
+
+ ar5523_dbg(ar, "TX Frame (%d pending)\n",
+ atomic_read(&ar->tx_nr_pending));
+ error = usb_submit_urb(urb, GFP_KERNEL);
+ if (error) {
+ ar5523_err(ar, "error %d when submitting tx urb\n",
+ error);
+ spin_lock_irqsave(&ar->tx_data_list_lock, flags);
+ list_del(&data->list);
+ spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
+ atomic_dec(&ar->tx_nr_pending);
+ ar5523_data_tx_pkt_put(ar);
+ usb_free_urb(urb);
+ ieee80211_free_txskb(ar->hw, skb);
+ }
+ } while (true);
+}
+
+static void ar5523_tx_work(struct work_struct *work)
+{
+ struct ar5523 *ar = container_of(work, struct ar5523, tx_work);
+
+ ar5523_dbg(ar, "%s\n", __func__);
+ mutex_lock(&ar->mutex);
+ ar5523_tx_work_locked(ar);
+ mutex_unlock(&ar->mutex);
+}
+
+static void ar5523_tx_wd_timer(unsigned long arg)
+{
+ struct ar5523 *ar = (struct ar5523 *) arg;
+
+ ar5523_dbg(ar, "TX watchdog timer triggered\n");
+ ieee80211_queue_work(ar->hw, &ar->tx_wd_work);
+}
+
+static void ar5523_tx_wd_work(struct work_struct *work)
+{
+ struct ar5523 *ar = container_of(work, struct ar5523, tx_wd_work);
+
+ /* Occasionally the TX queues stop responding. The only way to
+ * recover seems to be to reset the dongle.
+ */
+
+ mutex_lock(&ar->mutex);
+ ar5523_err(ar, "TX queue stuck (tot %d pend %d)\n",
+ atomic_read(&ar->tx_nr_total),
+ atomic_read(&ar->tx_nr_pending));
+
+ ar5523_err(ar, "Will restart dongle.\n");
+ ar5523_cmd_write(ar, WDCMSG_TARGET_RESET, NULL, 0, 0);
+ mutex_unlock(&ar->mutex);
+}
+
+static void ar5523_flush_tx(struct ar5523 *ar)
+{
+ ar5523_tx_work_locked(ar);
+
+ /* Don't waste time trying to flush if USB is disconnected */
+ if (test_bit(AR5523_USB_DISCONNECTED, &ar->flags))
+ return;
+ if (!wait_event_timeout(ar->tx_flush_waitq,
+ !atomic_read(&ar->tx_nr_pending), AR5523_FLUSH_TIMEOUT))
+ ar5523_err(ar, "flush timeout (tot %d pend %d)\n",
+ atomic_read(&ar->tx_nr_total),
+ atomic_read(&ar->tx_nr_pending));
+}
+
+static void ar5523_free_tx_cmd(struct ar5523 *ar)
+{
+ struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
+
+ usb_free_coherent(ar->dev, AR5523_MAX_RXCMDSZ, cmd->buf_tx,
+ cmd->urb_tx->transfer_dma);
+ usb_free_urb(cmd->urb_tx);
+}
+
+static int ar5523_alloc_tx_cmd(struct ar5523 *ar)
+{
+ struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
+
+ cmd->ar = ar;
+ init_completion(&cmd->done);
+
+ cmd->urb_tx = usb_alloc_urb(0, GFP_KERNEL);
+ if (!cmd->urb_tx) {
+ ar5523_err(ar, "could not allocate urb\n");
+ return -ENOMEM;
+ }
+ cmd->buf_tx = usb_alloc_coherent(ar->dev, AR5523_MAX_TXCMDSZ,
+ GFP_KERNEL,
+ &cmd->urb_tx->transfer_dma);
+ if (!cmd->buf_tx) {
+ usb_free_urb(cmd->urb_tx);
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+/*
+ * This function is called periodically (every second) when associated to
+ * query device statistics.
+ */
+static void ar5523_stat_work(struct work_struct *work)
+{
+ struct ar5523 *ar = container_of(work, struct ar5523, stat_work.work);
+ int error;
+
+ ar5523_dbg(ar, "%s\n", __func__);
+ mutex_lock(&ar->mutex);
+
+ /*
+ * Send request for statistics asynchronously once a second. This
+ * seems to be important. Throughput is a lot better if this is done.
+ */
+ error = ar5523_cmd_write(ar, WDCMSG_TARGET_GET_STATS, NULL, 0, 0);
+ if (error)
+ ar5523_err(ar, "could not query stats, error %d\n", error);
+ mutex_unlock(&ar->mutex);
+ ieee80211_queue_delayed_work(ar->hw, &ar->stat_work, HZ);
+}
+
+/*
+ * Interface routines to the mac80211 stack.
+ */
+static int ar5523_start(struct ieee80211_hw *hw)
+{
+ struct ar5523 *ar = hw->priv;
+ int error;
+ __be32 val;
+
+ ar5523_dbg(ar, "start called\n");
+
+ mutex_lock(&ar->mutex);
+ val = cpu_to_be32(0);
+ ar5523_cmd_write(ar, WDCMSG_BIND, &val, sizeof(val), 0);
+
+ /* set MAC address */
+ ar5523_config_multi(ar, CFG_MAC_ADDR, &ar->hw->wiphy->perm_addr,
+ ETH_ALEN);
+
+ /* XXX honor net80211 state */
+ ar5523_config(ar, CFG_RATE_CONTROL_ENABLE, 0x00000001);
+ ar5523_config(ar, CFG_DIVERSITY_CTL, 0x00000001);
+ ar5523_config(ar, CFG_ABOLT, 0x0000003f);
+ ar5523_config(ar, CFG_WME_ENABLED, 0x00000000);
+
+ ar5523_config(ar, CFG_SERVICE_TYPE, 1);
+ ar5523_config(ar, CFG_TP_SCALE, 0x00000000);
+ ar5523_config(ar, CFG_TPC_HALF_DBM5, 0x0000003c);
+ ar5523_config(ar, CFG_TPC_HALF_DBM2, 0x0000003c);
+ ar5523_config(ar, CFG_OVERRD_TX_POWER, 0x00000000);
+ ar5523_config(ar, CFG_GMODE_PROTECTION, 0x00000000);
+ ar5523_config(ar, CFG_GMODE_PROTECT_RATE_INDEX, 0x00000003);
+ ar5523_config(ar, CFG_PROTECTION_TYPE, 0x00000000);
+ ar5523_config(ar, CFG_MODE_CTS, 0x00000002);
+
+ error = ar5523_cmd_read(ar, WDCMSG_TARGET_START, NULL, 0,
+ &val, sizeof(val), AR5523_CMD_FLAG_MAGIC);
+ if (error) {
+ ar5523_dbg(ar, "could not start target, error %d\n", error);
+ goto err;
+ }
+ ar5523_dbg(ar, "WDCMSG_TARGET_START returns handle: 0x%x\n",
+ be32_to_cpu(val));
+
+ ar5523_switch_chan(ar);
+
+ val = cpu_to_be32(TARGET_DEVICE_AWAKE);
+ ar5523_cmd_write(ar, WDCMSG_SET_PWR_MODE, &val, sizeof(val), 0);
+ /* XXX? check */
+ ar5523_cmd_write(ar, WDCMSG_RESET_KEY_CACHE, NULL, 0, 0);
+
+ set_bit(AR5523_HW_UP, &ar->flags);
+ queue_work(ar->wq, &ar->rx_refill_work);
+
+ /* enable Rx */
+ ar5523_set_rxfilter(ar, 0, UATH_FILTER_OP_INIT);
+ ar5523_set_rxfilter(ar,
+ UATH_FILTER_RX_UCAST | UATH_FILTER_RX_MCAST |
+ UATH_FILTER_RX_BCAST | UATH_FILTER_RX_BEACON,
+ UATH_FILTER_OP_SET);
+
+ ar5523_set_ledsteady(ar, UATH_LED_ACTIVITY, UATH_LED_ON);
+ ar5523_dbg(ar, "start OK\n");
+
+err:
+ mutex_unlock(&ar->mutex);
+ return error;
+}
+
+static void ar5523_stop(struct ieee80211_hw *hw)
+{
+ struct ar5523 *ar = hw->priv;
+
+ ar5523_dbg(ar, "stop called\n");
+
+ cancel_delayed_work_sync(&ar->stat_work);
+ mutex_lock(&ar->mutex);
+ clear_bit(AR5523_HW_UP, &ar->flags);
+
+ ar5523_set_ledsteady(ar, UATH_LED_LINK, UATH_LED_OFF);
+ ar5523_set_ledsteady(ar, UATH_LED_ACTIVITY, UATH_LED_OFF);
+
+ ar5523_cmd_write(ar, WDCMSG_TARGET_STOP, NULL, 0, 0);
+
+ del_timer_sync(&ar->tx_wd_timer);
+ cancel_work_sync(&ar->tx_wd_work);
+ cancel_work_sync(&ar->rx_refill_work);
+ ar5523_cancel_rx_bufs(ar);
+ mutex_unlock(&ar->mutex);
+}
+
+static int ar5523_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
+{
+ struct ar5523 *ar = hw->priv;
+ int ret;
+
+ ar5523_dbg(ar, "set_rts_threshold called\n");
+ mutex_lock(&ar->mutex);
+
+ ret = ar5523_config(ar, CFG_USER_RTS_THRESHOLD, value);
+
+ mutex_unlock(&ar->mutex);
+ return ret;
+}
+
+static void ar5523_flush(struct ieee80211_hw *hw, bool drop)
+{
+ struct ar5523 *ar = hw->priv;
+
+ ar5523_dbg(ar, "flush called\n");
+ ar5523_flush_tx(ar);
+}
+
+static int ar5523_add_interface(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif)
+{
+ struct ar5523 *ar = hw->priv;
+
+ ar5523_dbg(ar, "add interface called\n");
+
+ if (ar->vif) {
+ ar5523_dbg(ar, "invalid add_interface\n");
+ return -EOPNOTSUPP;
+ }
+
+ switch (vif->type) {
+ case NL80211_IFTYPE_STATION:
+ ar->vif = vif;
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+ return 0;
+}
+
+static void ar5523_remove_interface(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif)
+{
+ struct ar5523 *ar = hw->priv;
+
+ ar5523_dbg(ar, "remove interface called\n");
+ ar->vif = NULL;
+}
+
+static int ar5523_hwconfig(struct ieee80211_hw *hw, u32 changed)
+{
+ struct ar5523 *ar = hw->priv;
+
+ ar5523_dbg(ar, "config called\n");
+ mutex_lock(&ar->mutex);
+ if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
+ ar5523_dbg(ar, "Do channel switch\n");
+ ar5523_flush_tx(ar);
+ ar5523_switch_chan(ar);
+ }
+ mutex_unlock(&ar->mutex);
+ return 0;
+}
+
+static int ar5523_get_wlan_mode(struct ar5523 *ar,
+ struct ieee80211_bss_conf *bss_conf)
+{
+ struct ieee80211_supported_band *band;
+ int bit;
+ struct ieee80211_sta *sta;
+ u32 sta_rate_set;
+
+ band = ar->hw->wiphy->bands[ar->hw->conf.channel->band];
+ sta = ieee80211_find_sta(ar->vif, bss_conf->bssid);
+ if (!sta) {
+ ar5523_info(ar, "STA not found!\n");
+ return WLAN_MODE_11b;
+ }
+ sta_rate_set = sta->supp_rates[ar->hw->conf.channel->band];
+
+ for (bit = 0; bit < band->n_bitrates; bit++) {
+ if (sta_rate_set & 1) {
+ int rate = band->bitrates[bit].bitrate;
+ switch (rate) {
+ case 60:
+ case 90:
+ case 120:
+ case 180:
+ case 240:
+ case 360:
+ case 480:
+ case 540:
+ return WLAN_MODE_11g;
+ }
+ }
+ sta_rate_set >>= 1;
+ }
+ return WLAN_MODE_11b;
+}
+
+static void ar5523_create_rateset(struct ar5523 *ar,
+ struct ieee80211_bss_conf *bss_conf,
+ struct ar5523_cmd_rateset *rs,
+ bool basic)
+{
+ struct ieee80211_supported_band *band;
+ struct ieee80211_sta *sta;
+ int bit, i = 0;
+ u32 sta_rate_set, basic_rate_set;
+
+ sta = ieee80211_find_sta(ar->vif, bss_conf->bssid);
+ basic_rate_set = bss_conf->basic_rates;
+ if (!sta) {
+ ar5523_info(ar, "STA not found. Cannot set rates\n");
+ sta_rate_set = bss_conf->basic_rates;
+ }
+ sta_rate_set = sta->supp_rates[ar->hw->conf.channel->band];
+
+ ar5523_dbg(ar, "sta rate_set = %08x\n", sta_rate_set);
+
+ band = ar->hw->wiphy->bands[ar->hw->conf.channel->band];
+ for (bit = 0; bit < band->n_bitrates; bit++) {
+ BUG_ON(i >= AR5523_MAX_NRATES);
+ ar5523_dbg(ar, "Considering rate %d : %d\n",
+ band->bitrates[bit].hw_value, sta_rate_set & 1);
+ if (sta_rate_set & 1) {
+ rs->set[i] = band->bitrates[bit].hw_value;
+ if (basic_rate_set & 1 && basic)
+ rs->set[i] |= 0x80;
+ i++;
+ }
+ sta_rate_set >>= 1;
+ basic_rate_set >>= 1;
+ }
+
+ rs->length = i;
+}
+
+static int ar5523_set_basic_rates(struct ar5523 *ar,
+ struct ieee80211_bss_conf *bss)
+{
+ struct ar5523_cmd_rates rates;
+
+ memset(&rates, 0, sizeof(rates));
+ rates.connid = cpu_to_be32(2); /* XXX */
+ rates.size = cpu_to_be32(sizeof(struct ar5523_cmd_rateset));
+ ar5523_create_rateset(ar, bss, &rates.rateset, true);
+
+ return ar5523_cmd_write(ar, WDCMSG_SET_BASIC_RATE, &rates,
+ sizeof(rates), 0);
+}
+
+static int ar5523_create_connection(struct ar5523 *ar,
+ struct ieee80211_vif *vif,
+ struct ieee80211_bss_conf *bss)
+{
+ struct ar5523_cmd_create_connection create;
+ int wlan_mode;
+
+ memset(&create, 0, sizeof(create));
+ create.connid = cpu_to_be32(2);
+ create.bssid = cpu_to_be32(0);
+ /* XXX packed or not? */
+ create.size = cpu_to_be32(sizeof(struct ar5523_cmd_rateset));
+
+ ar5523_create_rateset(ar, bss, &create.connattr.rateset, false);
+
+ wlan_mode = ar5523_get_wlan_mode(ar, bss);
+ create.connattr.wlanmode = cpu_to_be32(wlan_mode);
+
+ return ar5523_cmd_write(ar, WDCMSG_CREATE_CONNECTION, &create,
+ sizeof(create), 0);
+}
+
+static int ar5523_write_associd(struct ar5523 *ar,
+ struct ieee80211_bss_conf *bss)
+{
+ struct ar5523_cmd_set_associd associd;
+
+ memset(&associd, 0, sizeof(associd));
+ associd.defaultrateix = cpu_to_be32(0); /* XXX */
+ associd.associd = cpu_to_be32(bss->aid);
+ associd.timoffset = cpu_to_be32(0x3b); /* XXX */
+ memcpy(associd.bssid, bss->bssid, ETH_ALEN);
+ return ar5523_cmd_write(ar, WDCMSG_WRITE_ASSOCID, &associd,
+ sizeof(associd), 0);
+}
+
+static void ar5523_bss_info_changed(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ struct ieee80211_bss_conf *bss,
+ u32 changed)
+{
+ struct ar5523 *ar = hw->priv;
+ int error;
+
+ ar5523_dbg(ar, "bss_info_changed called\n");
+ mutex_lock(&ar->mutex);
+
+ if (!(changed & BSS_CHANGED_ASSOC))
+ goto out_unlock;
+
+ if (bss->assoc) {
+ error = ar5523_create_connection(ar, vif, bss);
+ if (error) {
+ ar5523_err(ar, "could not create connection\n");
+ goto out_unlock;
+ }
+
+ error = ar5523_set_basic_rates(ar, bss);
+ if (error) {
+ ar5523_err(ar, "could not set negotiated rate set\n");
+ goto out_unlock;
+ }
+
+ error = ar5523_write_associd(ar, bss);
+ if (error) {
+ ar5523_err(ar, "could not set association\n");
+ goto out_unlock;
+ }
+
+ /* turn link LED on */
+ ar5523_set_ledsteady(ar, UATH_LED_LINK, UATH_LED_ON);
+ set_bit(AR5523_CONNECTED, &ar->flags);
+ ieee80211_queue_delayed_work(hw, &ar->stat_work, HZ);
+
+ } else {
+ cancel_delayed_work(&ar->stat_work);
+ clear_bit(AR5523_CONNECTED, &ar->flags);
+ ar5523_set_ledsteady(ar, UATH_LED_LINK, UATH_LED_OFF);
+ }
+
+out_unlock:
+ mutex_unlock(&ar->mutex);
+
+}
+
+#define AR5523_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
+ FIF_ALLMULTI | \
+ FIF_FCSFAIL | \
+ FIF_OTHER_BSS)
+
+static void ar5523_configure_filter(struct ieee80211_hw *hw,
+ unsigned int changed_flags,
+ unsigned int *total_flags,
+ u64 multicast)
+{
+ struct ar5523 *ar = hw->priv;
+ u32 filter = 0;
+
+ ar5523_dbg(ar, "configure_filter called\n");
+ mutex_lock(&ar->mutex);
+ ar5523_flush_tx(ar);
+
+ *total_flags &= AR5523_SUPPORTED_FILTERS;
+
+ /* The filters seems strange. UATH_FILTER_RX_BCAST and
+ * UATH_FILTER_RX_MCAST does not result in those frames being RXed.
+ * The only way I have found to get [mb]cast frames seems to be
+ * to set UATH_FILTER_RX_PROM. */
+ filter |= UATH_FILTER_RX_UCAST | UATH_FILTER_RX_MCAST |
+ UATH_FILTER_RX_BCAST | UATH_FILTER_RX_BEACON |
+ UATH_FILTER_RX_PROM;
+
+ ar5523_set_rxfilter(ar, 0, UATH_FILTER_OP_INIT);
+ ar5523_set_rxfilter(ar, filter, UATH_FILTER_OP_SET);
+
+ mutex_unlock(&ar->mutex);
+}
+
+static const struct ieee80211_ops ar5523_ops = {
+ .start = ar5523_start,
+ .stop = ar5523_stop,
+ .tx = ar5523_tx,
+ .set_rts_threshold = ar5523_set_rts_threshold,
+ .add_interface = ar5523_add_interface,
+ .remove_interface = ar5523_remove_interface,
+ .config = ar5523_hwconfig,
+ .bss_info_changed = ar5523_bss_info_changed,
+ .configure_filter = ar5523_configure_filter,
+ .flush = ar5523_flush,
+};
+
+static int ar5523_host_available(struct ar5523 *ar)
+{
+ struct ar5523_cmd_host_available setup;
+
+ /* inform target the host is available */
+ setup.sw_ver_major = cpu_to_be32(ATH_SW_VER_MAJOR);
+ setup.sw_ver_minor = cpu_to_be32(ATH_SW_VER_MINOR);
+ setup.sw_ver_patch = cpu_to_be32(ATH_SW_VER_PATCH);
+ setup.sw_ver_build = cpu_to_be32(ATH_SW_VER_BUILD);
+ return ar5523_cmd_read(ar, WDCMSG_HOST_AVAILABLE,
+ &setup, sizeof(setup), NULL, 0, 0);
+}
+
+static int ar5523_get_devstatus(struct ar5523 *ar)
+{
+ u8 macaddr[ETH_ALEN];
+ int error;
+
+ /* retrieve MAC address */
+ error = ar5523_get_status(ar, ST_MAC_ADDR, macaddr, ETH_ALEN);
+ if (error) {
+ ar5523_err(ar, "could not read MAC address\n");
+ return error;
+ }
+
+ SET_IEEE80211_PERM_ADDR(ar->hw, macaddr);
+
+ error = ar5523_get_status(ar, ST_SERIAL_NUMBER,
+ &ar->serial[0], sizeof(ar->serial));
+ if (error) {
+ ar5523_err(ar, "could not read device serial number\n");
+ return error;
+ }
+ return 0;
+}
+
+#define AR5523_SANE_RXBUFSZ 2000
+
+static int ar5523_get_max_rxsz(struct ar5523 *ar)
+{
+ int error;
+ __be32 rxsize;
+
+ /* Get max rx size */
+ error = ar5523_get_status(ar, ST_WDC_TRANSPORT_CHUNK_SIZE, &rxsize,
+ sizeof(rxsize));
+ if (error != 0) {
+ ar5523_err(ar, "could not read max RX size\n");
+ return error;
+ }
+
+ ar->rxbufsz = be32_to_cpu(rxsize);
+
+ if (!ar->rxbufsz || ar->rxbufsz > AR5523_SANE_RXBUFSZ) {
+ ar5523_err(ar, "Bad rxbufsz from device. Using %d instead\n",
+ AR5523_SANE_RXBUFSZ);
+ ar->rxbufsz = AR5523_SANE_RXBUFSZ;
+ }
+
+ ar5523_dbg(ar, "Max RX buf size: %d\n", ar->rxbufsz);
+ return 0;
+}
+
+/*
+ * This is copied from rtl818x, but we should probably move this
+ * to common code as in OpenBSD.
+ */
+static const struct ieee80211_rate ar5523_rates[] = {
+ { .bitrate = 10, .hw_value = 2, },
+ { .bitrate = 20, .hw_value = 4 },
+ { .bitrate = 55, .hw_value = 11, },
+ { .bitrate = 110, .hw_value = 22, },
+ { .bitrate = 60, .hw_value = 12, },
+ { .bitrate = 90, .hw_value = 18, },
+ { .bitrate = 120, .hw_value = 24, },
+ { .bitrate = 180, .hw_value = 36, },
+ { .bitrate = 240, .hw_value = 48, },
+ { .bitrate = 360, .hw_value = 72, },
+ { .bitrate = 480, .hw_value = 96, },
+ { .bitrate = 540, .hw_value = 108, },
+};
+
+static const struct ieee80211_channel ar5523_channels[] = {
+ { .center_freq = 2412 },
+ { .center_freq = 2417 },
+ { .center_freq = 2422 },
+ { .center_freq = 2427 },
+ { .center_freq = 2432 },
+ { .center_freq = 2437 },
+ { .center_freq = 2442 },
+ { .center_freq = 2447 },
+ { .center_freq = 2452 },
+ { .center_freq = 2457 },
+ { .center_freq = 2462 },
+ { .center_freq = 2467 },
+ { .center_freq = 2472 },
+ { .center_freq = 2484 },
+};
+
+static int ar5523_init_modes(struct ar5523 *ar)
+{
+ BUILD_BUG_ON(sizeof(ar->channels) != sizeof(ar5523_channels));
+ BUILD_BUG_ON(sizeof(ar->rates) != sizeof(ar5523_rates));
+
+ memcpy(ar->channels, ar5523_channels, sizeof(ar5523_channels));
+ memcpy(ar->rates, ar5523_rates, sizeof(ar5523_rates));
+
+ ar->band.band = IEEE80211_BAND_2GHZ;
+ ar->band.channels = ar->channels;
+ ar->band.n_channels = ARRAY_SIZE(ar5523_channels);
+ ar->band.bitrates = ar->rates;
+ ar->band.n_bitrates = ARRAY_SIZE(ar5523_rates);
+ ar->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &ar->band;
+ return 0;
+}
+
+/*
+ * Load the MIPS R4000 microcode into the device. Once the image is loaded,
+ * the device will detach itself from the bus and reattach later with a new
+ * product Id (a la ezusb).
+ */
+static int ar5523_load_firmware(struct usb_device *dev)
+{
+ struct ar5523_fwblock *txblock, *rxblock;
+ const struct firmware *fw;
+ void *fwbuf;
+ int len, offset;
+ int foolen; /* XXX(hch): handle short transfers */
+ int error = -ENXIO;
+
+ if (request_firmware(&fw, AR5523_FIRMWARE_FILE, &dev->dev)) {
+ dev_err(&dev->dev, "no firmware found: %s\n",
+ AR5523_FIRMWARE_FILE);
+ return -ENOENT;
+ }
+
+ txblock = kmalloc(sizeof(*txblock), GFP_KERNEL);
+ if (!txblock)
+ goto out;
+
+ rxblock = kmalloc(sizeof(*rxblock), GFP_KERNEL);
+ if (!rxblock)
+ goto out_free_txblock;
+
+ fwbuf = kmalloc(AR5523_MAX_FWBLOCK_SIZE, GFP_KERNEL);
+ if (!fwbuf)
+ goto out_free_rxblock;
+
+ memset(txblock, 0, sizeof(struct ar5523_fwblock));
+ txblock->flags = cpu_to_be32(AR5523_WRITE_BLOCK);
+ txblock->total = cpu_to_be32(fw->size);
+
+ offset = 0;
+ len = fw->size;
+ while (len > 0) {
+ int mlen = min(len, AR5523_MAX_FWBLOCK_SIZE);
+
+ txblock->remain = cpu_to_be32(len - mlen);
+ txblock->len = cpu_to_be32(mlen);
+
+ /* send firmware block meta-data */
+ error = usb_bulk_msg(dev, ar5523_cmd_tx_pipe(dev),
+ txblock, sizeof(*txblock), &foolen,
+ AR5523_CMD_TIMEOUT);
+ if (error) {
+ dev_err(&dev->dev,
+ "could not send firmware block info\n");
+ goto out_free_fwbuf;
+ }
+
+ /* send firmware block data */
+ memcpy(fwbuf, fw->data + offset, mlen);
+ error = usb_bulk_msg(dev, ar5523_data_tx_pipe(dev),
+ fwbuf, mlen, &foolen,
+ AR5523_DATA_TIMEOUT);
+ if (error) {
+ dev_err(&dev->dev,
+ "could not send firmware block data\n");
+ goto out_free_fwbuf;
+ }
+
+ /* wait for ack from firmware */
+ error = usb_bulk_msg(dev, ar5523_cmd_rx_pipe(dev),
+ rxblock, sizeof(*rxblock), &foolen,
+ AR5523_CMD_TIMEOUT);
+ if (error) {
+ dev_err(&dev->dev,
+ "could not read firmware answer\n");
+ goto out_free_fwbuf;
+ }
+
+ len -= mlen;
+ offset += mlen;
+ }
+
+ /*
+ * Set the error to -ENXIO to make sure we continue probing for
+ * a driver.
+ */
+ error = -ENXIO;
+
+ out_free_fwbuf:
+ kfree(fwbuf);
+ out_free_rxblock:
+ kfree(rxblock);
+ out_free_txblock:
+ kfree(txblock);
+ out:
+ release_firmware(fw);
+ return error;
+}
+
+static int ar5523_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ struct usb_device *dev = interface_to_usbdev(intf);
+ struct ieee80211_hw *hw;
+ struct ar5523 *ar;
+ int error = -ENOMEM;
+
+ /*
+ * Load firmware if the device requires it. This will return
+ * -ENXIO on success and we'll get called back afer the usb
+ * id changes to indicate that the firmware is present.
+ */
+ if (id->driver_info & AR5523_FLAG_PRE_FIRMWARE)
+ return ar5523_load_firmware(dev);
+
+
+ hw = ieee80211_alloc_hw(sizeof(*ar), &ar5523_ops);
+ if (!hw)
+ goto out;
+ SET_IEEE80211_DEV(hw, &intf->dev);
+
+ ar = hw->priv;
+ ar->hw = hw;
+ ar->dev = dev;
+ mutex_init(&ar->mutex);
+
+ INIT_DELAYED_WORK(&ar->stat_work, ar5523_stat_work);
+ init_timer(&ar->tx_wd_timer);
+ setup_timer(&ar->tx_wd_timer, ar5523_tx_wd_timer, (unsigned long) ar);
+ INIT_WORK(&ar->tx_wd_work, ar5523_tx_wd_work);
+ INIT_WORK(&ar->tx_work, ar5523_tx_work);
+ INIT_LIST_HEAD(&ar->tx_queue_pending);
+ INIT_LIST_HEAD(&ar->tx_queue_submitted);
+ spin_lock_init(&ar->tx_data_list_lock);
+ atomic_set(&ar->tx_nr_total, 0);
+ atomic_set(&ar->tx_nr_pending, 0);
+ init_waitqueue_head(&ar->tx_flush_waitq);
+
+ atomic_set(&ar->rx_data_free_cnt, 0);
+ INIT_WORK(&ar->rx_refill_work, ar5523_rx_refill_work);
+ INIT_LIST_HEAD(&ar->rx_data_free);
+ INIT_LIST_HEAD(&ar->rx_data_used);
+ spin_lock_init(&ar->rx_data_list_lock);
+
+ ar->wq = create_singlethread_workqueue("ar5523");
+ if (!ar->wq) {
+ ar5523_err(ar, "Could not create wq\n");
+ goto out_free_ar;
+ }
+
+ error = ar5523_alloc_rx_bufs(ar);
+ if (error) {
+ ar5523_err(ar, "Could not allocate rx buffers\n");
+ goto out_free_wq;
+ }
+
+ error = ar5523_alloc_rx_cmd(ar);
+ if (error) {
+ ar5523_err(ar, "Could not allocate rx command buffers\n");
+ goto out_free_rx_bufs;
+ }
+
+ error = ar5523_alloc_tx_cmd(ar);
+ if (error) {
+ ar5523_err(ar, "Could not allocate tx command buffers\n");
+ goto out_free_rx_cmd;
+ }
+
+ error = ar5523_submit_rx_cmd(ar);
+ if (error) {
+ ar5523_err(ar, "Failed to submit rx cmd\n");
+ goto out_free_tx_cmd;
+ }
+
+ /*
+ * We're now ready to send/receive firmware commands.
+ */
+ error = ar5523_host_available(ar);
+ if (error) {
+ ar5523_err(ar, "could not initialize adapter\n");
+ goto out_cancel_rx_cmd;
+ }
+
+ error = ar5523_get_max_rxsz(ar);
+ if (error) {
+ ar5523_err(ar, "could not get caps from adapter\n");
+ goto out_cancel_rx_cmd;
+ }
+
+ error = ar5523_get_devcap(ar);
+ if (error) {
+ ar5523_err(ar, "could not get caps from adapter\n");
+ goto out_cancel_rx_cmd;
+ }
+
+ error = ar5523_get_devstatus(ar);
+ if (error != 0) {
+ ar5523_err(ar, "could not get device status\n");
+ goto out_cancel_rx_cmd;
+ }
+
+ ar5523_info(ar, "MAC/BBP AR5523, RF AR%c112\n",
+ (id->driver_info & AR5523_FLAG_ABG) ? '5' : '2');
+
+ ar->vif = NULL;
+ hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
+ IEEE80211_HW_SIGNAL_DBM |
+ IEEE80211_HW_HAS_RATE_CONTROL;
+ hw->extra_tx_headroom = sizeof(struct ar5523_tx_desc) +
+ sizeof(struct ar5523_chunk);
+ hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
+ hw->queues = 1;
+
+ error = ar5523_init_modes(ar);
+ if (error)
+ goto out_cancel_rx_cmd;
+
+ usb_set_intfdata(intf, hw);
+
+ error = ieee80211_register_hw(hw);
+ if (error) {
+ ar5523_err(ar, "could not register device\n");
+ goto out_cancel_rx_cmd;
+ }
+
+ ar5523_info(ar, "Found and initialized AR5523 device\n");
+ return 0;
+
+out_cancel_rx_cmd:
+ ar5523_cancel_rx_cmd(ar);
+out_free_tx_cmd:
+ ar5523_free_tx_cmd(ar);
+out_free_rx_cmd:
+ ar5523_free_rx_cmd(ar);
+out_free_rx_bufs:
+ ar5523_free_rx_bufs(ar);
+out_free_wq:
+ destroy_workqueue(ar->wq);
+out_free_ar:
+ ieee80211_free_hw(hw);
+out:
+ return error;
+}
+
+static void ar5523_disconnect(struct usb_interface *intf)
+{
+ struct ieee80211_hw *hw = usb_get_intfdata(intf);
+ struct ar5523 *ar = hw->priv;
+
+ ar5523_dbg(ar, "detaching\n");
+ set_bit(AR5523_USB_DISCONNECTED, &ar->flags);
+
+ ieee80211_unregister_hw(hw);
+
+ ar5523_cancel_rx_cmd(ar);
+ ar5523_free_tx_cmd(ar);
+ ar5523_free_rx_cmd(ar);
+ ar5523_free_rx_bufs(ar);
+
+ destroy_workqueue(ar->wq);
+
+ ieee80211_free_hw(hw);
+ usb_set_intfdata(intf, NULL);
+}
+
+#define AR5523_DEVICE_UG(vendor, device) \
+ { USB_DEVICE((vendor), (device)) }, \
+ { USB_DEVICE((vendor), (device) + 1), \
+ .driver_info = AR5523_FLAG_PRE_FIRMWARE }
+#define AR5523_DEVICE_UX(vendor, device) \
+ { USB_DEVICE((vendor), (device)), \
+ .driver_info = AR5523_FLAG_ABG }, \
+ { USB_DEVICE((vendor), (device) + 1), \
+ .driver_info = AR5523_FLAG_ABG|AR5523_FLAG_PRE_FIRMWARE }
+
+static struct usb_device_id ar5523_id_table[] = {
+ AR5523_DEVICE_UG(0x168c, 0x0001), /* Atheros / AR5523 */
+ AR5523_DEVICE_UG(0x0cf3, 0x0001), /* Atheros2 / AR5523_1 */
+ AR5523_DEVICE_UG(0x0cf3, 0x0003), /* Atheros2 / AR5523_2 */
+ AR5523_DEVICE_UX(0x0cf3, 0x0005), /* Atheros2 / AR5523_3 */
+ AR5523_DEVICE_UG(0x0d8e, 0x7801), /* Conceptronic / AR5523_1 */
+ AR5523_DEVICE_UX(0x0d8e, 0x7811), /* Conceptronic / AR5523_2 */
+ AR5523_DEVICE_UX(0x2001, 0x3a00), /* Dlink / DWLAG132 */
+ AR5523_DEVICE_UG(0x2001, 0x3a02), /* Dlink / DWLG132 */
+ AR5523_DEVICE_UX(0x2001, 0x3a04), /* Dlink / DWLAG122 */
+ AR5523_DEVICE_UG(0x1690, 0x0712), /* Gigaset / AR5523 */
+ AR5523_DEVICE_UG(0x1690, 0x0710), /* Gigaset / SMCWUSBTG */
+ AR5523_DEVICE_UG(0x129b, 0x160c), /* Gigaset / USB stick 108
+ (CyberTAN Technology) */
+ AR5523_DEVICE_UG(0x16ab, 0x7801), /* Globalsun / AR5523_1 */
+ AR5523_DEVICE_UX(0x16ab, 0x7811), /* Globalsun / AR5523_2 */
+ AR5523_DEVICE_UG(0x0d8e, 0x7802), /* Globalsun / AR5523_3 */
+ AR5523_DEVICE_UX(0x0846, 0x4300), /* Netgear / WG111U */
+ AR5523_DEVICE_UG(0x0846, 0x4250), /* Netgear / WG111T */
+ AR5523_DEVICE_UG(0x0846, 0x5f00), /* Netgear / WPN111 */
+ AR5523_DEVICE_UG(0x157e, 0x3006), /* Umedia / AR5523_1 */
+ AR5523_DEVICE_UX(0x157e, 0x3205), /* Umedia / AR5523_2 */
+ AR5523_DEVICE_UG(0x157e, 0x3006), /* Umedia / TEW444UBEU */
+ AR5523_DEVICE_UG(0x1435, 0x0826), /* Wistronneweb / AR5523_1 */
+ AR5523_DEVICE_UX(0x1435, 0x0828), /* Wistronneweb / AR5523_2 */
+ AR5523_DEVICE_UG(0x0cde, 0x0012), /* Zcom / AR5523 */
+ AR5523_DEVICE_UG(0x1385, 0x4250), /* Netgear3 / WG111T (2) */
+ AR5523_DEVICE_UG(0x1385, 0x5f00), /* Netgear / WPN111 */
+ AR5523_DEVICE_UG(0x1385, 0x5f02), /* Netgear / WPN111 */
+ { }
+};
+MODULE_DEVICE_TABLE(usb, ar5523_id_table);
+
+static struct usb_driver ar5523_driver = {
+ .name = "ar5523",
+ .id_table = ar5523_id_table,
+ .probe = ar5523_probe,
+ .disconnect = ar5523_disconnect,
+};
+
+static int __init ar5523_init(void)
+{
+ return usb_register(&ar5523_driver);
+}
+
+static void __exit ar5523_exit(void)
+{
+ usb_deregister(&ar5523_driver);
+}
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_FIRMWARE(AR5523_FIRMWARE_FILE);
+
+module_init(ar5523_init);
+module_exit(ar5523_exit);
This driver is for the AR5523 chipset from Atheros. It was created in 2007 by Christoph Hellwig but it was never finished. I found it a couple of months ago and after some polishing it's working pretty fine. The driver was written with the FreeBSD driver (uath) as reference, which was written with the reverse-engineered windows driver as reference, hence the feature set is very limited. Station mode only, no HW crypto offload. Signed-off-by: Pontus Fuchs <pontus.fuchs@gmail.com> --- drivers/net/wireless/ath/ar5523/ar5523.c | 1806 ++++++++++++++++++++++++++++++ 1 file changed, 1806 insertions(+) create mode 100644 drivers/net/wireless/ath/ar5523/ar5523.c